What are the performance testing tool?
There are many kinds of performance testing tool, which can be divided into the following categories according to different needs and technical characteristics:

Commercial performance testing tool. Tools such as LoadRunner, WebLOAD, NeoLoad, LoadView, etc., often offer comprehensive performance testing capabilities, including load testing, stress testing, and performance monitoring. They are suitable for a variety of industries and test scenarios, but may require specialized knowledge and training to use effectively.
Open source performance testing tool. Such as Apache JMeter, Gatling, tsung, etc., these tools are free and open source, easy to learn and use, suitable for small and medium-sized projects and beginners, they support a variety of protocols and interfaces, suitable for Web applications and various services performance testing.
Scenario-specific performance testing tool. Tools such as k6, Locust, Flood, and others focus on the needs of specific scenarios or user groups, such as full-link pressure testing for distributed systems, cloud-based load testing, or API performance testing, and they are often easy to integrate into existing CI/CD processes.
Choosing the right performance testing tool depends on the specific testing needs, resources, and technical requirements. At the same time, performance testing is not only the use of tools, but also the formulation of test plans, the collection and analysis of test data, and the formulation and evaluation of performance standards and other performance management processes.